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John Mcmahon — 1920 US Census Record

Linked across censuses

1920 United States Federal Census · Erie, New York

Our Model Tree links this John Mcmahon across the 1910 and 1920 US Censuses in Erie, New York (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 10-person household.

Age 12 b. ~1908 Male Son Born: New York Single

1920 Census Record Details

Census Year1920
LocationErie, New York
SurnameMcMahon
Given NameJohn
Relationship to HeadSon
SexM
Color / RaceWhite
Age12
Marital StatusSingle
BirthplaceNew York
Father's BirthplaceIreland
Mother's BirthplaceNew York
Additional Details
Occupationnone
Can ReadYes
Can WriteYes
Birth StateNew York
Birth CountryUnited States
Birthplace (normalized)new york
Township / WardBuffalo City
Est. Birth Year~1908

Household Members

Census records only state relationship to the household head. Pairwise kinship is derived (~90–95% accurate), not recorded. Step/blended families and boarders can break it.

10 people recorded at the same address in the 1920 census.

Name Relation to head Relative to John Age Birth yr
Agnes Mcmahon Daughter — 9 ~1911
Loretta Mcmahon Daughter — 4 ~1916
Geraldine Mcmahon Daughter — 1 ~1919
Ellen Mcmahon Daughter — 13 ~1907
Margaret Mcmahon Daughter — 16 ~1904
Rose Mcmahon Daughter — 7 ~1913
John Mcmahon Head — 47 ~1873
John Mcmahon Son — 12 ~1908
Andrew Mcmahon Son — 11 ~1909
Minnie Mcmahon Spouse — 42 ~1878

Census Appearances

1910
Erie, New …
Son, age 2
Erie, New York · implied b. ~1908 — 4 household members
●  Primary link · ~Confirmed · 2 sources
XGBoost Household
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 2
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace New York
Birth State New York
Birth Country United States
Birthplace (normalized) new york
1920
Erie, New …
Son, age 12
Erie, New York · implied b. ~1908 — 10 household members
Surname McMahon
Given Name John
Relationship to Head Son
Sex M
Color / Race White
Age 12
Marital Status Single
Birthplace New York
Father's Birthplace Ireland
Mother's Birthplace New York
Occupation none
Can Read Yes
Can Write Yes
Birth State New York
Birth Country United States
Birthplace (normalized) new york

Model Tree

An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Linked across censuses
Our Model Tree links John Mcmahon across 2 US Census years (1910 and 1920) in Erie, New York, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcmahon
Son · 1920 · age 12 · b. ~1908 · New York
★ You are viewing this record
Sibling
Loretta Mcmahon
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Mcmahon
Sibling · 1920 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcmahon
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mcmahon
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Mcmahon
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Andrew Mcmahon
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Mcmahon
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+) Probable / derived (~0.65–0.89) Candidate (<0.65, unverified)

Original Census Page

1920 US Federal Census — Erie, New York Open full size

Page Contents

50 people indexed on this census page (ia:1920:14thcensusofpopu1102unit:0762)

Line Name Age Relation Occupation Birthplace
1 Fred Lucchi 31 Head Handy Man Italy
2 Rose Lucchi 24 Wife None Italy
3 James Lucchi 7 Son None New York
4 Mary Lucchi 5 Daughter None New York
5 Susan Lucchi 3 Daughter None New York
6 Tony Lucchi 1 Son None New York
7 James Vinci 23 Head Handy Man Italy
8 Angelo Vinci 24 Boarder Handy Man Italy
9 Fred Herrick 47 Head Machinist New York
10 Annie Herrick 36 Wife None New York
11 Mildred Herrick 15 Daughter — New York
12 Fred Herrick 14 Son — New York
13 Ethel Herrick 12 Daughter — New York
14 Edward Herrick 2 Son — New York
15 Fred Herrick 2 Head Core Maker New York
16 Rose Herrick 2 Wife — New York
17 Fred Frank 54 Head Carpenter New York
18 Augusta Frank 50 Wife None New York
19 Albert Frank 24 Son Garage Man New York
20 Mattie Frank 15 Daughter — New York
21 Grace Frank 13 Daughter — New York
22 Augusta Frank 81 Mother — Germany
23 John Zonilla 31 Head Foreman Italy
24 Carmella Zonilla 31 Wife None Italy
25 Teresa Zonilla 6 Daughter None New York
26 Angelo Zonilla 4 Son None New York
27 Grace Zonilla 1 Daughter None New York
28 Charles Williams 23 Head Loco. Fireman Massachusetts
29 Nellie Williams 21 Wife None New York
30 Garland Williams 2 Son None New York
31 Frank Williams 20 Brother None Massachusetts
32 John Mcmahon 47 Head Switchman Ireland
33 Minnie Mcmahon 42 Wife None New York
34 Margaret Mcmahon 16 Daughter Secretary New York
35 Ellen Mcmahon 13 Daughter — New York
36 John Mcmahon THIS PERSON 12 Son None New York
37 Andrew Mcmahon 11 Son None New York
38 Agnes Mcmahon 9 Daughter None New York
39 Rose Mcmahon 7 Daughter None New York
40 Loretta Mcmahon 4 Daughter None New York
41 Geraldine Mcmahon 1 Daughter None New York
42 Mary Rooney 42 Head Cleaning Lady Ireland
43 Thomas Rooney 34 Brother Carpenter Ireland
44 James Rooney 53 Head Blacksmith Ireland
45 Catherine Rooney 50 Wife None Ireland
46 John Rooney 26 Son Blacksmith New York
47 William Rooney 24 Son None New York
48 Joseph Rooney 21 Son Boiler Maker New York
49 Patrick Rooney 20 Son Blacksmith New York
50 Thomas Rooney 17 Son Blacksmith New York

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About This Record & Model Tree

This record was independently indexed by YourRoots from the 1920 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.

Source: National Archives and Records Administration (NARA)

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